Boston Marathon Registration Opens September 8

Field size for 2015 race not yet determined.

Registration for the 2015 Boston Marathon will open for time qualifiers on September 8, the Boston Athletic Association announced this morning. The field size for the April 20 race hasn't been set, and will be announced this summer.

Registration will follow the same rolling-admission process the B.A.A. has used for time qualifiers since 2012.

On Monday, September 8, those who have met their qualifying standard by 20 or more minutes will be allowed to register. On September 10, those who have met their standard by 10 or more minutes may register. On September 12, 5-minutes-or-faster qualifiers can register.

If space remains, then all time qualifiers may register starting on Monday, September 15, and ending on September 17. Registrants' qualifying times will be ranked so that those who are the most under their age and gender standard will be given entry as space allows.

If qualifier spots remain after September 17, then registration will reopen on Monday, September 22, with all qualifiers vying for the available spots on a first-come, first-served basis until the field limit is reached.

In 2013, the marathon's field was 27,000 runners, with about 80 percent of them time qualifiers. The field was expanded to 36,000 for this year's race, with about 70 percent of them time qualifiers. B.A.A. spokesman Jack Fleming told Runner's World Newswire the organization will aim for the 80 percent figure for the 2015 race.